Yes. In a system without IP Secure, only one master device communicates with an IP router or an IP interface. You can specify a further seven IP Touch Panels as slave devices; these will communicate exclusively via the master on the KNX bus.
With Secure Tunneling, the maximum number of IP Touch Panels is dependent on the tunneling connections freely available on the IP router/IP interface. For more details on how to commission multiple IP Touch Panels with an IP router or an IP interface, see our Engineering Guide.Display, free@home, Panel